from tkinter import*
coords= [0,0,10,0,10,10,20,10,20,20,10,20,10,30,0,30]
root=Tk()
root.title("ИТ марафон")
root.geometry("500x500")

canvas=Canvas(bg="white",width=500,height=500)
canvas.pack(anchor=CENTER,expand=1)

canvas.create_polygon(coords)
root.mainloop()
